Western astrology

Natal chart

A natal chart is a map of the tropical sky at birth. The date places the Sun, Moon, and planets in the seasonal zodiac. The time and place set the rising sign and the houses. Enter those details for a wheel calculated from that birth, including the major aspects between the planets.

Birth details

Calculate a natal chart

Date, time, and place. A clock time is required for the rising sign and houses.

Choose a suggestion to confirm the place. Coordinates appear after you pick one.

Used for house overlays when birth time is known.

How to read the chart

Start with rising, Moon, and Sun

The rising sign is the tropical sign on the eastern horizon. It begins the houses. The Moon is the faster, more intimate rhythm. The Sun is the seasonal center most people already know. Read those three before treating any one of them as the whole person.

Planets, signs, houses, aspects

Planets describe functions, signs describe style, houses describe the area of life, and aspects describe the conversation between two points. Conjunction, opposition, trine, square, and sextile are the five majors on Inner Light. The orb is how far the angle may stand from exact and still be counted.

Tropical and sidereal

This page uses the tropical zodiac. The same birth details on the birth chart page also produce a sidereal Kundli. Neither frame is a correction of the other; they are two long-standing ways of naming the same sky.

Common questions

What is a natal chart?
A natal chart is a map of where the Sun, Moon, and planets stood at birth. Western astrology uses the tropical zodiac, aligned to the seasons — 0° Aries at the March equinox. Vedic astrology uses the sidereal zodiac, aligned to the stars, usually with the Lahiri ayanamsha. The planets are the same; the frame that names their signs differs, which is why a tropical Sun sign is often the sign after the sidereal one. Inner Light calculates both from one set of birth details.